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    <title>Document</title>
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<body>
    <script>
         let arr = [2, 6, 6,1, 77, 52, 25, 7,7,];
         let max = arr[0];
        for (let i = 1; i < arr.length; i++) {
            if (arr[i] > max) {
                max = arr[i];
            } 福然德4我是跟他说过台湾
        }

        console.log("数组的最大值是 " + max);

        
        let sum = 0;
        for (let i = 0; i < arr.length; i++) {
           
            sum = sum + arr[i];
        }

        console.log('数组的和是' + sum);
        console.log('数组的平均数是' + sum / arr.length);
   

        

let result = "[";
for (let index in arr) {
    
    if (index == arr.length - 1) {
        
        result = result + "\'" + arr[index] + "\'";
    } else {
        result = result + "\'" + arr[index] + "\'" + ", ";
    }
}
result = result + "]";
console.log(result);



    </script>
</body>
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